Newton's Melodies - Promo codes giveaway. They give free promo codes if you post a comment on their youtube channel (post "I want promo code" and subscribe to get it). Here is the link: http://www.youtube.com/watch?v=CFT_5w2vGmI&feature=youtube_gdata and their site on itunes: http://itunes.apple.com/us/app/newtons-melodies/id364609965?mt=8
